[lkml]   [2015]   [Apr]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [REGRESSION] commit 0461a41 "spi: Pump transfers inside calling context for spi_sync()" breaks Apalis/Colibri T30 with MCP2515 SPI CAN controller
On 04/10/2015 03:23 PM, Mark Brown wrote:
> On Fri, Apr 10, 2015 at 03:00:53PM +0200, Marcel Ziswiler wrote:
>> Hi there
> Please try to use somewhat more targetted CC lists...
>> I also have not yet looked further into what exactly is happening and
>> whether or not the SPI stack, the Tegra SPI controller driver or the
>> MCP2515 SPI CAN driver is to blame but rather decided to ask Mr. Brown
>> and the community first for any insights they might have to share.
>> Anybody?
> I'd ask for trace logs but obviously we can't turn them on until boot
> has finished... Adding some trace in the relevant bits of code to try
> to see where it's deadlocking is the obvious first step.

FWIW: the mcp2515 driver is accessing the SPI bus during probe(). Seems
you have to instrument the SPI stack and/or host driver.


Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | |

[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2015-04-10 17:41    [W:0.061 / U:4.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site